A short Google search turned up oe2mbx, which claims to read Outlook Express 4/5 dbx files to mbox files. A Perl interface is not available, but for example the Mail::Box suite of modules can easily parse/manipulate the mbox file.

perl -MHTTP::Daemon -MHTTP::Response -MLWP::Simple -e ' ;    # The  
$d = new HTTP::Daemon and fork and getprint $d->url and exit;#spider
($c = $d->accept())->get_request(); $c->send_response( new   #in the
HTTP::Response(200,$_,$_,qq(Just another Perl hacker\n))); ' #  web

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In reply to Re: parse OE5 DBX file by Corion
in thread parse OE5 DBX file by Anonymous Monk

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